我有多个线性布局，如何一次更改某些或全部背景，然后又一次更改它们，等等？
|
在我的活动中，我大约有40个线性布局...基本上是5个父母和所说父母的其余孩子。
我想要做的是更改某些背景，然后单击一个按钮并更改其他背景。
我遇到的问题是...不幸的是，我现在没有确切的代码，因为一旦更改背景，就必须将其设置为null。
我在Java类中拥有的代码看起来像这样...
mlayout1= findViewById(R.id.layout1);
mlayout2= findViewById(R.id.layout2);
mlayout3= findViewById(R.id.layout3);
mlayout4= findViewById(R.id.layout3);
if variable = 1{
mlayout1.setBackgroundResource(R.drawable.background_img);
mlayout2.setBackgroundResource(R.drawable.background_img);
mlayout3.setBackgroundResource(R.drawable.background_img);
mlayout4.setBackgroundResource(R.drawable.background_img);
}
if variable = 2{
mlayout1.setBackgroundResource(R.drawable.background_img);
mlayout2.setBackgroundResource(null);
mlayout3.setBackgroundResource(R.drawable.background_img);
mlayout4.setBackgroundResource(null);
}
if variable = 3{
mlayout1.setBackgroundResource(R.drawable.background_img);
mlayout2.setBackgroundResource(null);
mlayout3.setBackgroundResource(null);
mlayout4.setBackgroundResource(null);
}
没有找到相关结果
已邀请:
1 个回复
陷牡彭拈峰
public void onCreate(Bundle b) { setContentView(R.layout.main); List<View> myViews = new ArrayList<View>(); myViews.add(findViewById(R.id.layout1)); myViews.add(findViewById(R.id.layout2)); // etc. }public void performSelection(int selection) { // One of your parents that holds a lot of child views ViewGroup parent = (ViewGroup)findViewById(R.id.parent_1); for(int i = 0; i < parent.getChildCount(); i++) { View v = parent.getChildAt(i); // If selection is 1, this sets the drawable background on every item. // If 2, then sets drawable on 0, 2, 4, 6, ... and null on 1, 3, 5, ... // If 3, then sets drawable on 0, 3, 6, 9, ... and null on 1, 2, 4, 5, ... if (i % selection == 0) { v.setBackgroundResource(R.drawable.background_img); } else { v.setBackgroundResource(null); } } }：<LinearLayout ...> <TextView android:id=\"@+id/element_text\" ... /> <!-- etc --> </LinearLayout>public void onCreate(Bundle b) { setContentView(R.layout.main); // One of your parents that will hold a lot of child views ViewGroup parent = (ViewGroup)findViewById(R.id.parent_1); for (int i = 0; i < NUM_CHILDREN; i++) { View newView = getLayoutInflater().inflate(R.layout.one_element, null); // Set anything specific to the new view // eg. TextView tv = (TextView)newView.findViewById(R.id.element_text); tv.setText(String.format(\"Hi, I\'m element %d!\", i)); // Add it to the parent parent.addView(newView); } }